What type of joint is the Midtarsal joint?
synovial joints
The transverse tarsal joint, also referred to as the midtarsal or Chopart’s joint, crosses the foot horizontally in an S-shaped direction, connecting the hindfoot and midfoot. It is a compound joint composed of two smaller, synovial joints: talonavicular and calcaneocuboid articulations.
Where is the Midtarsal joint?
The Chopart joint complex, also known as the midtarsal or transverse tarsal joint, is located between the hindfoot and midfoot and consists of the talocalcaneonavicular and calcaneocuboid joints.
What is the position of the subtalar joint at heel strike?
The tibia rotates medially at heel strike and the talus follows resulting in pronation of the subtalar joint or a valgus heel (Fig.
What are Midtarsal joints?
The midtarsal joint (MTJt) consists of the combined articulations of the talonavicular and calcaneocuboid joints and represents the functional articulation between the rearfoot (talus and calcaneus) and the midfoot (navicular and cuboid).
What does the Midtarsal Joint do?
The midtarsal joint contributes to inversion (supination) and eversion (pronation) movements at the subtalar joint. It also allows 20° of adduction (foot turned toward the midline) and 10° of abduction (foot turned away from the midline).
What is the movement axis of the ankle joint inversion?
In the foot and ankle, an axis that lies in the frontal and transverse plane gives rise to plantar flexion and dorsiflexion in the sagittal plane. • An axis falling in the sagittal and transverse planes gives rise to inversion and eversion in the frontal plane.
What is subtalar axis?
The axis of the subtalar joint lies about 42° superiorly to the sagittal plane and about 16° to 23° medial to the transverse plane. The literature presents vast ranges of subtalar motion ranging from 5° to 65°. The average ROM for pronation is 5° and 20° for supination.
What is a Midtarsal amputation?
Medical Definition of midtarsal amputation : amputation of the forepart of the foot through the midtarsal joint.
What is longitudinal arch?
The longitudinal arch of the foot is an arch in the sagittal plane formed by the calcaneus and the metatarsals, it can be subdivided into medial and lateral arches (and the comprising osseous structures can be referred to as columns).
What is medial longitudinal arch of foot?
The medial longitudinal arch is formed by specific structures that allow the foot to function effectively. The medial arch is composed of the first three metatarsals, three cuneiforms, navicular, talus, and calcaneus bones of the foot. The calcaneus and talus articulate at the subtalar joint to form the hindfoot.
Which is an anterior view of the midtarsal joint?
The diagram, redrawn from McPoil and Knecht (1985), is an anterior view of the proximal surface of midtarsal joint. The C denotes the calcaneus where it articulates with the cuboid, and the T denotes the talus where it articulates with the navicular.
Is the oblique axis similar to the horizontal axis?
The oblique axis (image ‘B’ below) lies about 52° superior to the horizontal plane and 57° from the midline. The longitudinal axis is close to the subtalar joint axis and the oblique axis is similar to the talocrural joint axis. MT Joint Locking[edit| edit source] An important function of the foot is propulsion of weight during stance phase.
What is the effect of midtarsal joint locking?
The purpose of this study was to quantify the effect of midtarsal joint locking on midfoot and forefoot mobility. In general, we hypothesized that there would be more motion in the midfoot and forefoot when the calcaneus was everted than when the calcaneus was inverted.
What causes the midtarsal joint to become non-parallel?
Subtalar pronation causes the MTJ axes to become more parallel. Subtalar supination causes the MTJ axes to become non-parallel The diagram, redrawn from McPoil and Knecht (1985), is an anterior view of the proximal surface of midtarsal joint.